Evaluation of herbicides on grain yield and nutrient uptake in rice (Oryza sativa L.)

Nine weed control treatments were tested in randomized block design with four replications to study performance of different herbicides on weed growth and yield in direct seeded rice (Oryza sativa L.) under puddled condition. Application of penoxsulam@25 g/ha significantly reduced weed population and dry weight. Significantly more grain yield was recorded due to herbicidal treatments. The highest grain yield was recorded in weed free (4.89 t/ha) treatment, which was statistically at par with cyhalofop-butyl (70 g/ha) followed by 2, 4-D sodium 800 g/ha (4.62 t/ha) and penoxsulam 25 g/ha (4.60 t/ha). All weed control treatments caused significant reduction in uptake of nutrients by weeds.